/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package sample.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import sample.entity.com.AccountSessionBeanLocal;

/**
 *
 * @author NgoanTT
 */
public class Controller extends HttpServlet {
    private final String welcomePage = "welcome.jsp";
    private final String failPage = "fail.jsp";
    private final String indexPage = "index.jsp";

    private final static Logger log = Logger.getLogger("Controller");


    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String action = request.getParameter("action");
            if(action.equals("Login")){
                String username = request.getParameter("txtUser");
                String password = request.getParameter("txtPass");

                Context ctx = new InitialContext();
                Object ref = ctx.lookup("AccountLocalJNDI");
                AccountSessionBeanLocal local = (AccountSessionBeanLocal) ref;
                boolean result = local.checkLogin(username, password);
                String url = failPage;
                if(result){
                    HttpSession session = request.getSession();
                    session.setAttribute("USER", username);
                    url = welcomePage;
                }
                RequestDispatcher rd = request.getRequestDispatcher(url);
                rd.forward(request, response);

            }
        } catch (NamingException ex) {
            Logger.getLogger(Controller.class.getName()).log(Level.SEVERE, null, ex);
        } finally { 
            out.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
